<template>
    <div class="city-list" ref="wrapper">
        <div>
            <div class="area">
                <div class="title border-topbottom">当前城市</div>
                <div class="button-list">
                    <div class="button-wrapper">
                        <div class="button">{{this.city}}</div>
                    </div>
                </div>
            </div>
            <div class="area">
                <div class="title border-topbottom">热门城市</div>
                <div class="button-list">
                    <div class="button-wrapper" v-for="item of hot" :key="item.id">
                        <div class="button" @click="handleCityClick(item.name)">{{item.name}}</div>
                    </div>
                </div>
            </div>
            <div 
                class="area"
                v-for="(item, key) of cities"
                :key="key"
                :ref="key"    
            >
                <div class="title border-topbottom">{{key}}</div>
                <div class="item-list">
                    <div
                        class="item border-bottom"
                        v-for="innerItem of item"
                        @click="handleCityClick(innerItem.name)"
                        :key="innerItem.id">
                        {{innerItem.name}}
                    </div>
                </div>
            </div>
        </div>
    </div>
</template>
<script>
import { mapState, mapMutations } from 'vuex';
import Bscroll from 'better-scroll'
export default {
    name: 'CityList',
    computed: {
        ...mapState(['city'])
    },
    mounted() {
        this.scroll = new Bscroll(this.$refs.wrapper)
    },
    methods: {
        handleCityClick(city) {
            this.changeCity(city);
            this.$router.push('/');
        },
        ...mapMutations(['changeCity'])
    },
    watch: {
        letter () {
            if (this.letter) {
                const element = this.$refs[this.letter][0];
                this.scroll.scrollToElement(element);
            }
        }
    },
    props: {
        hot: Array,
        cities: Object,
        letter: String
    }
}
</script>

<style lang="stylus" scoped>
@import '~styles/varibles.styl'
.border-topbottom
    &:before
        border-color: #ccc
    &:after
        border-color: #ccc
.border-bottom
    &:before
        border: 1px solid #ccc
.city-list
    overflow: hidden
    position: absolute
    top: 1.58rem
    left: 0
    right: 0
    bottom: 0
    .title
        background: #eee
        line-height: .54rem
        padding-left: .2rem
        color: #666
        font-size: .26rem
    .button-list
        padding: .1rem .6rem .1rem .1rem
        overflow: hidden
        .button-wrapper
            float: left
            width: 33.333%
            .button
                margin: .1rem
                padding: .1rem 0
                font-size: .26rem
                text-align: center
                border: .02rem solid #ccc
                border-radius: .06rem
    .item-list
        .item
            line-height: .76rem
            color: #666
            font-size: .24rem
            padding-left: .2rem
</style>


